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Old 24 February 2011, 16:18   #11
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Quick update. Been in contact with Garmin support. Still pending their final deliberations, but it looks like the Garmin can't get past its desire to calculate remaining fuel based on how much the engine says it has drunk. Looks to me like they might need a software tweak.
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Old 18 March 2011, 16:47   #12
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Probably irrelevant but there was a software tweak:

"Fixed an issue with MFDs unable to configure the GFL10 Tank Capacity."

I know you don't have a GFL10 but it might do something to yours?
Ver 5.9 onwards, don't know how old, you may well be ahead of that already

Also, I haven't got it with me but my new smartcraft manual goes into a fair bit of detail on tank calibration. I did have a quick read and it didn't sound that straightforward. As my 5012 is now showing a page full of fuel data same as yours, it may offer an insight
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Old 18 March 2011, 17:35   #13
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I'm running the latest Garmin software but it doesn't help. Complex subject, and I still can't fathom whether it is the GPS that does the calibration of the fuel level or the fuel sender. I suspect the profile is stored in the sender so that it would apply to any MFD you had that was receiving the data. If that is the case, then as my sender is non-Garmin I don't think I have much chance of calibrating it. Still, it would be nice if it just used the sender for fuel level and not it's guestimate as to how much I've sent out the exhaust.
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Old 18 March 2011, 18:04   #14
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Quote:
Originally Posted by Erin View Post
Any idea where in the menus the calibration option is for irregular shaped tanks?
'T'ain't that irregular
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Old 24 March 2011, 09:34   #15
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Bit of further info in case anyone ever dregs this up in the future.

I spoke to OSUKL the mfr of my fuel level sender. Apparently the only N2K sentences a sender can output is volumetric percentage or level percentage. Any calculation to work out how many litres or gallons that relates to is done in the MFD or plotter. It sounds like Garmin have been in touch with OSUKL (possibly as a result of my enquiry) as they have sent them a sender for testing. Hopefully they'll amend their software.

There is only one way of calibrating the volumetric percentage reading from the sender and that is to connect it to an OSUKL display unit. However, as my tank is relatively linear, there doesn't seem much point in doing this.
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